SERIES

Supernatural Sam and Castiel (Jared Padalecki, Misha Collins) follow a case to a picturesque small town in Arkansas, where they find nothing is as idyllic as it appears to be, while Dean and Jack (Jensen Ackles, Alexander Calvert) are on a road trip of their own. 8 p.m. KTLA

Project Runway Season 4 winner Christian Siriano takes over Tim Gunn’s mentoring duties and supermodel Karlie Kloss is the new host when the unscripted competition returns for its 17th season with a 90-minute premiere. Elle editor in chief Nina Garcia returns to her seat on the judges panel, joined by fashion designer Brandon Maxwell and journalist Elaine Welteroth. 8 p.m. Bravo

A.P. Bio Jack (Glenn Howerton) is the new drivers education teacher, and he seeks revenge against his mother’s church. 8:30 p.m. NBC

Brooklyn Nine-Nine A visitor from Latvia causes Charles and Jake (Joe Lo Truglio, Andy Samberg) to investigate Nikolaj’s (Antonio Raul Corbo) family while Holt and Amy (Andre Braugher, Melissa Fumero) bring in famed forensic scientist Dr. Yee (Reggie Lee) to help close a case for Rosa (Stephanie Beatriz) in this new episode of the police comedy. 9 p.m. NBC

For the People Tina (Anna Deavere Smith) insists on protecting a young boy after his father, a witness in Leonard’s (Regé-Jean Page) case, has a run-in with federal agents that could lead to his deportation. 10 p.m. ABC

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Broad City When Abbi (Abbi Jacobson) and Ilana (Ilana Glazer) see an Off-Broadway production of “Sleep No More,” the conscience-stricken characters resonate for Abbi, who has been trying to find the right time to tell her best friend some life-changing news in this new episode. 10 p.m. Comedy Central

SPECIALS

iHeartRadio Music Awards Garth Brooks receives the first iHeartRadio Artist of the Decade Award as this event celebrates the most-played artists and songs on iHeartRadio stations in 2018. Alicia Keys receives the Innovator Award, and Halsey is honored with the Fangirls Award. Up for song of the year are “Better Now” (Post Malone), “Girls Like You” (Maroon 5 featuring Cardi B), “God’s Plan” (Drake), “Perfect” (Ed Sheeran) and “The Middle” (Zedd, Maren Morris, Grey). Scheduled performers include Alicia Keys, Ariana Grande, Halsey, Garth Brooks, John Legend and Kacey Musgraves. From Microsoft Theater. 8 p.m. Fox

Ed Stockly handles the TV Listings and highlights for the L.A. Times and is the resident TV Skeptic, occasionally writing about TV shows that feature the paranormal, bad science, mermaids, Big Foot, aliens and quackery.